Malware Analysis Report

2024-10-16 03:23

Sample ID 210310-6calh615fj
Target BABUK.exe
SHA256 afcf265a1dcd9eab5aab270d48aa561e4ddeb71c05e32c857d3b809bb64c0430
Tags
babuk ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

afcf265a1dcd9eab5aab270d48aa561e4ddeb71c05e32c857d3b809bb64c0430

Threat Level: Known bad

The file BABUK.exe was found to be: Known bad.

Malicious Activity Summary

babuk ransomware

Babuk Locker

Deletes shadow copies

Modifies extensions of user files

Drops startup file

Enumerates connected drives

Enumerates physical storage devices

Interacts with shadow copies

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-03-10 22:42

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2021-03-10 22:42

Reported

2021-03-10 22:44

Platform

win10v20201028

Max time kernel

34s

Max time network

68s

Command Line

"C:\Users\Admin\AppData\Local\Temp\BABUK.exe"

Signatures

Babuk Locker

ransomware babuk

Deletes shadow copies

ransomware

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\FormatEdit.tif => C:\Users\Admin\Pictures\FormatEdit.tif.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\FormatRestore.png => C:\Users\Admin\Pictures\FormatRestore.png.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\EnterSelect.crw => C:\Users\Admin\Pictures\EnterSelect.crw.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\InstallUnprotect.raw => C:\Users\Admin\Pictures\InstallUnprotect.raw.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\SearchRevoke.crw => C:\Users\Admin\Pictures\SearchRevoke.crw.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\ShowCheckpoint.crw => C:\Users\Admin\Pictures\ShowCheckpoint.crw.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\StopGet.crw => C:\Users\Admin\Pictures\StopGet.crw.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\ClearResize.raw => C:\Users\Admin\Pictures\ClearResize.raw.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\How To Restore Your Files.txt C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A

Enumerates physical storage devices

Interacts with shadow copies

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\vssadmin.exe N/A
N/A N/A C:\Windows\system32\vssadmin.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
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N/A N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\BABUK.exe

"C:\Users\Admin\AppData\Local\Temp\BABUK.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssadmin.exe

vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe

"C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssadmin.exe

vssadmin.exe delete shadows /all /quiet

Network

N/A

Files

memory/1108-2-0x00000000021E0000-0x00000000021E1000-memory.dmp

memory/1108-3-0x00000000029E0000-0x00000000029E1000-memory.dmp

memory/4016-4-0x0000000000000000-mapping.dmp

memory/3660-5-0x0000000000000000-mapping.dmp

memory/3616-6-0x0000000000000000-mapping.dmp

memory/1196-7-0x0000000000000000-mapping.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2021-03-10 22:42

Reported

2021-03-10 22:44

Platform

win7v20201028

Max time kernel

126s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\BABUK.exe"

Signatures

Babuk Locker

ransomware babuk

Deletes shadow copies

ransomware

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\CompressBlock.tiff => C:\Users\Admin\Pictures\CompressBlock.tiff.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\DebugWait.raw => C:\Users\Admin\Pictures\DebugWait.raw.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened for modification C:\Users\Admin\Pictures\BackupCheckpoint.tiff C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened for modification C:\Users\Admin\Pictures\CompressBlock.tiff C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\BackupCheckpoint.tiff => C:\Users\Admin\Pictures\BackupCheckpoint.tiff.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\DebugMerge.tif => C:\Users\Admin\Pictures\DebugMerge.tif.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened for modification C:\Users\Admin\Pictures\DenyTrace.tiff C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened for modification C:\Users\Admin\Pictures\EnterJoin.tiff C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\DenyTrace.tiff => C:\Users\Admin\Pictures\DenyTrace.tiff.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\EnterJoin.tiff => C:\Users\Admin\Pictures\EnterJoin.tiff.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File renamed C:\Users\Admin\Pictures\InstallFind.tif => C:\Users\Admin\Pictures\InstallFind.tif.babyk C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A

Enumerates physical storage devices

Interacts with shadow copies

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\vssadmin.exe N/A
N/A N/A C:\Windows\system32\vssadmin.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
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N/A N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1340 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe C:\Windows\System32\cmd.exe
PID 1340 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe C:\Windows\System32\cmd.exe
PID 1340 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe C:\Windows\System32\cmd.exe
PID 1340 wrote to memory of 1984 N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe C:\Windows\System32\cmd.exe
PID 1984 wrote to memory of 524 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1984 wrote to memory of 524 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1984 wrote to memory of 524 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1340 wrote to memory of 920 N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe C:\Windows\System32\cmd.exe
PID 1340 wrote to memory of 920 N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe C:\Windows\System32\cmd.exe
PID 1340 wrote to memory of 920 N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe C:\Windows\System32\cmd.exe
PID 1340 wrote to memory of 920 N/A C:\Users\Admin\AppData\Local\Temp\BABUK.exe C:\Windows\System32\cmd.exe
PID 920 wrote to memory of 1968 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 920 wrote to memory of 1968 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 920 wrote to memory of 1968 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe

Processes

C:\Users\Admin\AppData\Local\Temp\BABUK.exe

"C:\Users\Admin\AppData\Local\Temp\BABUK.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssadmin.exe

vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssadmin.exe

vssadmin.exe delete shadows /all /quiet

Network

N/A

Files

memory/1340-2-0x0000000076691000-0x0000000076693000-memory.dmp

memory/1340-4-0x00000000023C0000-0x00000000023D1000-memory.dmp

memory/1340-3-0x00000000009A0000-0x00000000009B1000-memory.dmp

memory/1984-5-0x0000000000000000-mapping.dmp

memory/524-6-0x0000000000000000-mapping.dmp

memory/920-7-0x0000000000000000-mapping.dmp

memory/1968-8-0x0000000000000000-mapping.dmp